/* 基础样式 */
:root {
    --primary-color: #f48fb1;
    --primary-light: #ffc1e3;
    --primary-dark: #bf5f82;
    --secondary-color: #f8bbd0;
    --text-color: #333;
    --text-light: #666;
    --light-bg: #fff9fb;
    --card-bg: #ffffff;
    --border-color: #f8bbd0;
    --border-radius: 12px;
    --shadow: 0 4px 20px rgba(244, 143, 177, 0.1);
    --shadow-hover: 0 6px 24px rgba(244, 143, 177, 0.2);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --gradient: linear-gradient(135deg, #f8bbd0 0%, #f48fb1 100%);
}

/* 暗黑模式变量 */
[data-theme="dark"] {
    --primary-color: #f06292;
    --primary-light: #ff94c2;
    --primary-dark: #ad1457;
    --secondary-color: #ad1457;
    --text-color: #f5f5f5;
    --text-light: #b0b0b0;
    --light-bg: #1e1e2e;
    --card-bg: #2a2a3a;
    --border-color: #4a2a3a;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 6px 24px rgba(0, 0, 0, 0.4);
    --gradient: linear-gradient(135deg, #ad1457 0%, #6a1b9a 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'ZQKJingYaGuPu', 'ZCOOL KuaiLe', 'Sawarabi Gothic', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--light-bg);
    color: var(--text-color);
    line-height: 1.8;
    transition: var(--transition);
    padding: 0;
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.guestbook-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 100px 20px 40px;
    flex: 1;
    width: 100%;
}

.guestbook-content {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.guestbook-title {
    font-size: 2.2rem;
    text-align: center;
    margin: 0;
    padding: 30px 20px 10px;
    color: var(--primary-color);
    position: relative;
    display: inline-block;
    width: 100%;
}

.guestbook-title i {
    margin-right: 12px;
    color: var(--primary-light);
}

.guestbook-title:after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gradient);
    margin: 15px auto 0;
    border-radius: 3px;
}

.guestbook-subtitle {
    text-align: center;
    color: var(--text-light);
    margin: 0 0 30px;
    padding: 0 20px 30px;
    font-size: 1.1rem;
    border-bottom: 1px dashed var(--border-color);
}

h1, h2 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

/* 表单样式 */
.message-form {
    background: var(--card-bg);
    padding: 30px;
    margin: 0;
    border-bottom: 1px dashed var(--border-color);
    transition: var(--transition);
}

.message-form h2 {
    margin-top: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
    position: relative;
}

.message-form h2:after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 2px;
    background: var(--primary-color);
}

.form-group {
    margin-bottom: 20px;
    position: relative;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 15px;
    transition: var(--transition);
    background-color: var(--light-bg);
    color: var(--text-color);
    font-family: inherit;
    resize: none;
}

textarea {
    min-height: 120px;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(244, 143, 177, 0.3);
    background-color: var(--card-bg);
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
textarea::placeholder {
    color: var(--text-light);
    opacity: 0.7;
}

.emoji-picker {
    margin: 20px 0 25px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.emoji-picker span:first-child {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-right: 5px;
}

.emoji {
    font-size: 22px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--light-bg);
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    user-select: none;
}

.emoji:hover {
    transform: scale(1.15) translateY(-2px);
    background: var(--primary-light);
    color: white;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.submit-btn {
    background: var(--gradient);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(244, 143, 177, 0.3);
    width: 100%;
    max-width: 200px;
    margin: 0 auto;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.submit-btn i {
    transition: transform 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(244, 143, 177, 0.4);
}

.submit-btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px rgba(244, 143, 177, 0.3);
}

.submit-btn:hover i {
    transform: translateX(3px);
}

.submit-btn:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 50%;
    transform: scale(1, 1) translate(-50%, -50%);
    transform-origin: 50% 50%;
}

.submit-btn:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

/* 留言列表样式 */
.messages-container {
    padding: 0;
    background: var(--card-bg);
}

.messages-container h2 {
    padding: 25px 30px 15px;
    margin: 0;
    font-size: 1.5rem;
    color: var(--primary-color);
    border-bottom: 1px dashed var(--border-color);
    display: flex;
    align-items: center;
}

.messages-container h2 i {
    margin-right: 10px;
    color: var(--primary-light);
}

.messages-list {
    padding: 20px 30px 30px;
    display: grid;
    gap: 20px;
}

.message-card {
    background: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 0;
    margin: 0;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.message-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.message-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient);
    transition: var(--transition);
}

.message-card:hover:before {
    width: 6px;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px 20px 15px;
    background: rgba(0, 0, 0, 0.02);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .message-header {
    background: rgba(255, 255, 255, 0.03);
}

.message-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid var(--primary-light);
    background: var(--card-bg);
    position: relative;
    transition: var(--transition);
}

.message-card:hover .message-avatar {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.message-avatar .user-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.message-card:hover .message-avatar .user-avatar {
    transform: scale(1.1);
}

.message-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.message-name {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    line-height: 1.3;
}

.message-email {
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: normal;
    margin-left: 5px;
}

.message-time {
    font-size: 0.85rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 5px;
}

.message-time i {
    font-size: 0.9em;
    color: var(--primary-light);
}

.message-content {
    padding: 15px 20px 20px;
    line-height: 1.7;
    color: var(--text-color);
    white-space: pre-line;
    word-break: break-word;
}

.no-messages {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-light);
    font-size: 1.1rem;
}

.no-messages i {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 15px;
    color: var(--primary-light);
    opacity: 0.7;
}

.loading {
    text-align: center;
    padding: 30px;
    color: var(--text-light);
}

.loading i {
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.pagination {
    display: flex;
    justify-content: center;
    margin-top: 30px;
    gap: 10px;
    flex-wrap: wrap;
}

.page-btn {
    padding: 8px 15px;
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.page-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.page-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    cursor: default;
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--light-bg);
    color: var(--text-light);
    border-color: var(--border-color);
}

.message-time {
    color: #999;
    font-size: 0.8em;
}

.message-content {
    line-height: 1.5;
}

.no-messages {
    text-align: center;
    padding: 40px 20px;
    color: #999;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.no-messages .no-messages-icon {
    width: 100px;
    height: 100px;
    object-fit: contain;
    margin-bottom: 15px;
    opacity: 0.8;
    transition: var(--transition);
}

.no-messages:hover .no-messages-icon {
    opacity: 1;
    transform: scale(1.05);
}

/* 通知样式 */
.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* 暗黑模式切换按钮 */
.theme-switch {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    transition: var(--transition);
}

.theme-switch:hover {
    transform: scale(1.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .message-form, .messages-container {
        padding: 15px;
    }
    
    .emoji-picker {
        gap: 8px;
    }
    
    .emoji {
        font-size: 20px;
    }
}

/* 管理员回复样式 */
.admin-reply {
    margin-top: 12px;
    padding: 12px;
    background-color: rgba(74, 108, 247, 0.05);
    border-radius: 8px;
    border-right: 3px solid #4a6cf7;
}

.admin-reply-header {
    display: flex;
    align-items: center;
    margin-bottom: 6px;
    color: #4a6cf7;
    font-size: 0.9em;
    font-weight: 500;
}

.admin-reply-header i {
    margin-right: 6px;
}

.admin-reply-header small {
    margin-left: auto;
    color: #888;
    font-size: 0.8em;
}

.admin-reply-content {
    color: #333;
    line-height: 1.5;
}

/* 暗黑模式适配 */
[data-theme="dark"] .admin-reply {
    background-color: rgba(74, 108, 247, 0.15);
    border-right-color: #5d7bf0;
}

[data-theme="dark"] .admin-reply-header {
    color: #8ea3f0;
}

[data-theme="dark"] .admin-reply-content {
    color: #e0e0e0;
}

/* 管理员回复头像图标样式 */
.admin-reply-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 6px;
    box-shadow: 0 0 0 2px rgba(74, 108, 247, 0.2);
}